| Autor: |
Shigehisa Tanaka, Suzuki Makoto, M. Koizumi, T. Ido, Hirohisa Sano, Hiroaki Inoue |
| Rok vydání: |
1996 |
| Předmět: |
|
| Zdroj: |
Journal of Lightwave Technology. 14:2026-2034 |
| ISSN: |
0733-8724 |
| Popis: |
Integrating the input and output waveguides with a multiple-quantum-well (MQW) electro-absorption (EA) optical modulator is shown to achieve ultra-high-speed modulation while keeping the total device length long enough for easy fabrication and packaging. Testing with fabricated modulators showed that a shorter modulation region results in a larger modulation bandwidth. The additional loss due to the waveguide integration was less than 1 dB. An optimized modulator showed a large modulation bandwidth of 50 GHz, a low driving voltage of less than 3 V, and a low insertion loss of 8 dB. A prototype module of this modulator had a bandwidth of greater than 40 GHz. Optimizing the MQW structure makes the modulator insensitive to polarization. These results demonstrate that MQW-EA modulators with integrated waveguides are advantageous in terms of fabrication, packaging, and ultra-high-speed modulation. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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